1 /* 2 * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* @test 25 * @bug 7003398 26 * @run main/othervm Equals 27 */ 28 29 import java.io.ByteArrayOutputStream; 30 import java.io.PrintStream; 31 import java.net.InetAddress; 32 import java.net.NetworkInterface; 33 import java.net.SocketException; 34 import java.util.Arrays; 35 import java.util.Collections; 36 import java.util.Enumeration; 37 import java.util.HashMap; 38 39 public class Equals { 40 41 static final boolean isWindows = System.getProperty("os.name").startsWith("Windows"); 42 main(String args[])43 public static void main(String args[]) throws Exception { 44 ByteArrayOutputStream baos = new ByteArrayOutputStream(); 45 PrintStream bufferedOut = new PrintStream(baos); 46 47 Enumeration<NetworkInterface> nifs1 = NetworkInterface.getNetworkInterfaces(); 48 HashMap<String,Integer> hashes = new HashMap<>(); 49 HashMap<String,NetworkInterface> nicMap = new HashMap<>(); 50 51 while (nifs1.hasMoreElements()) { 52 NetworkInterface ni = nifs1.nextElement(); 53 hashes.put(ni.getName(),ni.hashCode()); 54 nicMap.put(ni.getName(),ni); 55 displayInterfaceInformation(ni, bufferedOut); 56 bufferedOut.flush(); 57 } 58 59 System.setSecurityManager(new SecurityManager()); 60 61 Enumeration<NetworkInterface> nifs2 = NetworkInterface.getNetworkInterfaces(); 62 while (nifs2.hasMoreElements()) { 63 NetworkInterface ni = nifs2.nextElement(); 64 65 // JDK-8022963, Skip (Windows)Teredo Tunneling Pseudo-Interface 66 String dName = ni.getDisplayName(); 67 if (isWindows && dName != null && dName.contains("Teredo")) 68 continue; 69 70 NetworkInterface niOrig = nicMap.get(ni.getName()); 71 72 int h = ni.hashCode(); 73 if (h != hashes.get(ni.getName())) { 74 System.out.printf("%nSystem information:%n"); 75 System.out.printf("%s", baos.toString("UTF8")); 76 System.out.printf("%nni.hashCode() returned %d, expected %d, for:%n", 77 h, hashes.get(ni.getName())); 78 displayInterfaceInformation(ni, System.out); 79 throw new RuntimeException("Hashcodes different for " + 80 ni.getName()); 81 } 82 if (!ni.equals(niOrig)) { 83 System.out.printf("%nSystem information:%n"); 84 System.out.printf("%s", baos.toString("UTF8")); 85 System.out.printf("%nExpected the following interfaces to be the same:%n"); 86 displayInterfaceInformation(niOrig, System.out); 87 displayInterfaceInformation(ni, System.out); 88 throw new RuntimeException("equality different for " + 89 ni.getName()); 90 } 91 } 92 } 93 displayInterfaceInformation(NetworkInterface netint, PrintStream out)94 static void displayInterfaceInformation(NetworkInterface netint, 95 PrintStream out) throws SocketException { 96 out.printf("Display name: %s%n", netint.getDisplayName()); 97 out.printf("Name: %s%n", netint.getName()); 98 Enumeration<InetAddress> inetAddresses = netint.getInetAddresses(); 99 100 for (InetAddress inetAddress : Collections.list(inetAddresses)) 101 out.printf("InetAddress: %s%n", inetAddress); 102 103 out.printf("Up? %s%n", netint.isUp()); 104 out.printf("Loopback? %s%n", netint.isLoopback()); 105 out.printf("PointToPoint? %s%n", netint.isPointToPoint()); 106 out.printf("Supports multicast? %s%n", netint.supportsMulticast()); 107 out.printf("Virtual? %s%n", netint.isVirtual()); 108 out.printf("Hardware address: %s%n", 109 Arrays.toString(netint.getHardwareAddress())); 110 out.printf("MTU: %s%n", netint.getMTU()); 111 out.printf("Index: %s%n", netint.getIndex()); 112 out.printf("%n"); 113 } 114 } 115 116